Do you like maths?

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Across
  1. 6. 50 and 50
  2. 7. between thirty five and thirty seven
  3. 9. B,my class
  4. 10. 9,10,_ , 12, 13
  5. 11. In December, Santa comes that day.
  6. 12. double the 7
Down
  1. 1. Saint Patrick's Day
  2. 2. 7X SEVEN
  3. 3. after 15 but before 17
  4. 4. I love February
  5. 5. 20-5=
  6. 7. Goldilocks and the _____ bears
  7. 8. 3x3
  8. 13. Ears, arms, legs and eyes